103 lines
3.9 KiB
JavaScript
103 lines
3.9 KiB
JavaScript
/*************************************************************************
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http.request() function
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====================
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The http.request() function will fetch a web address asynchronously (on a
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separate thread)and pass the URL's response to a callback function
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which will be executed synchronously (on the main thread). In this
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way, http.request() can be used to fetch web content without blocking the
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main thread of execution.
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Parameters
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----------
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* request: The request details either a plain URL e.g. "http://scriptcraft.js/sample.json" or an object with the following properties...
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- url: The URL of the request.
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- method: Should be one of the standard HTTP methods, GET, POST, PUT, DELETE (defaults to GET).
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- params: A Javascript object with name-value pairs. This is for supplying parameters to the server.
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* callback: The function to be called when the Web request has completed. This function takes the following parameters...
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- responseCode: The numeric response code from the server. If the server did not respond with 200 OK then the response parameter will be undefined.
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- response: A string (if the response is of type text) or object containing the HTTP response body.
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Example
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-------
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The following example illustrates how to use http.request to make a request to a JSON web service and evaluate its response...
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var jsResponse;
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http.request("http://scriptcraftjs.org/sample.json",function(responseCode, responseBody){
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jsResponse = eval("(" + responseBody + ")");
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});
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... The following example illustrates a more complex use-case POSTing parameters to a CGI process on a server...
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http.request({ url: "http://pixenate.com/pixenate/pxn8.pl",
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method: "POST",
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params: {script: "[]"}
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}, function( responseCode, responseBody){
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var jsObj = eval("(" + responseBody + ")");
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});
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***/
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var http = http || {};
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http.request = function( request, callback)
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{
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var paramsToString = function(params){
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var result = "";
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var paramNames = [];
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for (var i in params){
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paramNames.push(i);
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}
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for (var i = 0;i < paramNames.length;i++){
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result += paramNames[i] + "=" + encodeURI(params[paramNames[i]]);
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if (i < paramNames.length-1)
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result += "&";
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}
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return result;
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};
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server.scheduler.runTaskAsynchronously(__plugin,function()
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{
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var url, paramsAsString, conn, requestMethod;
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if (typeof request === "string"){
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url = request;
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requestMethod = "GET";
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}else{
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paramsAsString = paramsToString(request.params);
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requestMethod = request.method || "GET";
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if (requestMethod == "GET" && request.params){
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// append each parameter to the URL
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url = request.url + "?" + paramsAsString;
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}
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}
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conn = new java.net.URL(url).openConnection();
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conn.requestMethod = requestMethod;
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conn.doOutput = true;
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conn.instanceFollowRedirects = false;
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if (conn.requestMethod == "POST"){
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conn.doInput = true;
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// put each parameter in the outputstream
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conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
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conn.setRequestProperty("charset", "utf-8");
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conn.setRequestProperty("Content-Length", "" + paramsAsString.length);
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conn.useCaches =false ;
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wr = new java.io.DataOutputStream(conn.getOutputStream ());
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wr.writeBytes(paramsAsString);
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wr.flush();
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wr.close();
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}
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var rc = conn.responseCode;
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var response;
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var stream;
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if (rc == 200){
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stream = conn.getInputStream();
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response = new java.util.Scanner(stream).useDelimiter("\\A").next();
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}
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server.scheduler.runTask(__plugin,function(){
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callback(rc,response);
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});
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});
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};
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